Finding the Fourth Proportional to 1,109,086.36, 1,663,629.69 and 267,638.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109,086.36 : 1,663,629.69 = 267,638.11 : x
2. Step 2: Convert to fraction form
   1,109,086.36/1,663,629.69 = 267,638.11/x
3. Step 3: Cross multiply
   1,109,086.36x = 1,663,629.69 × 267,638.11
4. Step 4: Simplify right side
   1,109,086.36x = 445,250,697,653.34
5. Step 5: Solve for x
   x = 445,250,697,653.34/1,109,086.36
6. Step 6: Final answer
   x = 401,457.20